<template>
    <view>
        <view v-if="leftBottom||rightBottom||leftTop||rightTop" :class="{
        'uni-fab--leftBottom': leftBottom,
        'uni-fab--rightBottom': rightBottom,
        'uni-fab--leftTop': leftTop,
        'uni-fab--rightTop': rightTop
      }" class="uni-fab">
            <view :class="{
          'uni-fab__content--left': horizontal === 'left',
          'uni-fab__content--right': horizontal === 'right',
          'uni-fab__content--flexDirection': direction === 'vertical',
          'uni-fab__content--flexDirectionStart': flexDirectionStart,
          'uni-fab__content--flexDirectionEnd': flexDirectionEnd,
		  'uni-fab__content--other-platform': !isAndroidNvue
        }"
                  :style="{ width: boxWidth, height: boxHeight, backgroundColor: styles.backgroundColor }"
                  class="uni-fab__content">
                <view v-if="flexDirectionStart || horizontalLeft" class="uni-fab__item uni-fab__item--first"/>
                <view v-for="(item, index) in content" :key="index" :class="{ 'uni-fab__item--active': isShow }"
                      class="uni-fab__item"
                      @click="_onItemClick(index, item)">
                    <image :src="item.active ? item.selectedIconPath : item.iconPath" class="uni-fab__item-image"
                           mode="widthFix"/>
                    <text class="uni-fab__item-text"
                          :style="{ color: item.active ? styles.selectedColor : styles.color }">{{ item.text }}
                    </text>
                </view>
                <view v-if="flexDirectionEnd || horizontalRight" class="uni-fab__item uni-fab__item--first"/>
            </view>
            <view :class="{
          'uni-fab__circle--left': horizontal === 'left' && direction === 'horizontal',
          'uni-fab__circle--top': vertical === 'top' && direction === 'vertical',
          'uni-fab__circle--bottom': vertical === 'bottom' && direction === 'vertical',
          'uni-fab__circle--right': horizontal === 'right' && direction === 'horizontal',
		  'uni-fab__plus--active': isShow,
		  'uni-fab__content--other-platform': !isAndroidNvue
        }"
                  class="uni-fab__circle uni-fab__plus" :style="{ 'background-color': styles.buttonColor }"
                  @click="_onClick">
                <view class="fab-circle-v"></view>
                <view class="fab-circle-h"></view>
            </view>
        </view>
    </view>
</template>

<script>
    let platform = 'other'
    // #ifdef APP-NVUE
    platform = uni.getSystemInfoSync().platform
    // #endif
    export default {
        name: 'UniFab',
        props: {
            pattern: {
                type: Object,
                default () {
                    return {}
                }
            },
            horizontal: {
                type: String,
                default: 'left'
            },
            vertical: {
                type: String,
                default: 'bottom'
            },
            direction: {
                type: String,
                default: 'horizontal'
            },
            content: {
                type: Array,
                default () {
                    return []
                }
            },
            show: {
                type: Boolean,
                default: false
            }
        },
        data () {
            return {
                fabShow: false,
                isShow: false,
                isAndroidNvue: platform === 'android',
                styles: {
                    color: '#3c3e49',
                    selectedColor: '#007AFF',
                    backgroundColor: '#fff',
                    buttonColor: '#3c3e49'
                }
            }
        },
        computed: {
            contentWidth (e) {
                return (this.content.length + 1) * 55 + 10 + 'px'
            },
            contentWidthMin () {
                return 55 + 'px'
            },
            // 动态计算宽度
            boxWidth () {
                return this.getPosition(3, 'horizontal')
            },
            // 动态计算高度
            boxHeight () {
                return this.getPosition(3, 'vertical')
            },
            // 计算左下位置
            leftBottom () {
                return this.getPosition(0, 'left', 'bottom')
            },
            // 计算右下位置
            rightBottom () {
                return this.getPosition(0, 'right', 'bottom')
            },
            // 计算左上位置
            leftTop () {
                return this.getPosition(0, 'left', 'top')
            },
            rightTop () {
                return this.getPosition(0, 'right', 'top')
            },
            flexDirectionStart () {
                return this.getPosition(1, 'vertical', 'top')
            },
            flexDirectionEnd () {
                return this.getPosition(1, 'vertical', 'bottom')
            },
            horizontalLeft () {
                return this.getPosition(2, 'horizontal', 'left')
            },
            horizontalRight () {
                return this.getPosition(2, 'horizontal', 'right')
            }
        },
        watch: {
            pattern (newValue, oldValue) {
                //console.log(JSON.stringify(newValue))
                this.styles = Object.assign({}, this.styles, newValue)
            }
        },
        created () {
            this.isShow = this.show
            if (this.top === 0) {
                this.fabShow = true
            }
            // 初始化样式
            this.styles = Object.assign({}, this.styles, this.pattern)
        },
        methods: {
            _onClick () {
                this.isShow = !this.isShow
            },
            open () {
                this.isShow = true
            },
            close () {
                this.isShow = false
            },
            /**
             * 按钮点击事件
             */
            _onItemClick (index, item) {
                this.$emit('trigger', {
                    index,
                    item
                })
            },
            /**
             * 获取 位置信息
             */
            getPosition (types, paramA, paramB) {
                if (types === 0) {
                    return this.horizontal === paramA && this.vertical === paramB
                } else if (types === 1) {
                    return this.direction === paramA && this.vertical === paramB
                } else if (types === 2) {
                    return this.direction === paramA && this.horizontal === paramB
                } else {
                    return this.isShow && this.direction === paramA ? this.contentWidth : this.contentWidthMin
                }
            }
        }
    }
</script>

<style lang="scss" scoped>
    @import '@/uni.scss';

    .uni-fab {
        position: fixed;
        /* #ifndef APP-NVUE */
        display: flex;
        /* #endif */
        justify-content: center;
        align-items: center;
        z-index: 10;
    }

    .uni-fab--top {
        width: 30px;
        height: 30px;
        right: 15px;
        bottom: 30px;
        border-style: solid;
        border-width: 1px;
        border-color: #5989b9;
        border-radius: 5px;
        transition: opacity 0.3;
        opacity: 0;
    }

    .uni-fab--active {
        opacity: 1;
    }

    .uni-fab--leftBottom {
        left: 15px;
        bottom: 30px;
    }

    .uni-fab--leftTop {
        left: 15px;
        top: 40px;
        /* #ifdef H5 */
        top: calc(40px + var(--window-top));
        /* #endif */
    }

    .uni-fab--rightBottom {
        right: 15px;
        bottom: 30px;
    }

    .uni-fab--rightTop {
        right: 15px;
        top: 40px;
        /* #ifdef H5 */
        top: calc(40px + var(--window-top));
        /* #endif */
    }

    .uni-fab__circle {
        /* #ifndef APP-NVUE */
        display: flex;
        /* #endif */
        justify-content: center;
        align-items: center;
        position: absolute;
        width: 55px;
        height: 55px;
        background-color: #3c3e49;
        border-radius: 55px;
        z-index: 11;
    }

    .uni-fab__circle--left {
        left: 0;
    }

    .uni-fab__circle--right {
        right: 0;
    }

    .uni-fab__circle--top {
        top: 0;
    }

    .uni-fab__circle--bottom {
        bottom: 0;
    }

    .uni-fab__plus {
        transform: rotate(0deg);
        transition: transform 0.3s;
        font-weight: bold;
    }

    .uni-fab__plus--active {
        transform: rotate(135deg);
    }

    .fab-circle-v {
        position: absolute;
        width: 3px;
        height: 31px;
        left: 26px;
        top: 12px;
        background-color: white;
    }

    .fab-circle-h {
        position: absolute;
        width: 31px;
        height: 3px;
        left: 12px;
        top: 26px;
        background-color: white;
    }

    .uni-fab__content {
        /* #ifndef APP-NVUE */
        box-sizing: border-box;
        display: flex;
        /* #endif */
        flex-direction: row;
        border-radius: 55px;
        overflow: hidden;
        transition-property: width, height;
        transition-duration: 0.2s;
        width: 55px;
        border-color: #DDDDDD;
        border-width: 1*1upx;
        border-style: solid;
    }

    .uni-fab__content--other-platform {
        border-width: 0px;
        box-shadow: 0 0 5px 2px rgba(0, 0, 0, 0.2);
    }

    .uni-fab__content--left {
        justify-content: flex-start;
    }

    .uni-fab__content--right {
        justify-content: flex-end;
    }

    .uni-fab__content--flexDirection {
        flex-direction: column;
        justify-content: flex-end;
    }

    .uni-fab__content--flexDirectionStart {
        flex-direction: column;
        justify-content: flex-start;
    }

    .uni-fab__content--flexDirectionEnd {
        flex-direction: column;
        justify-content: flex-end;
    }

    .uni-fab__item {
        /* #ifndef APP-NVUE */
        display: flex;
        /* #endif */
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 55px;
        height: 55px;
        opacity: 0;
        transition: opacity 0.2s;
    }

    .uni-fab__item--active {
        opacity: 1;
    }

    .uni-fab__item-image {
        width: 25px;
        height: 25px;
        margin-bottom: 3px;
    }

    .uni-fab__item-text {
        color: #FFFFFF;
        font-size: 12px;
    }

    .uni-fab__item--first {
        width: 55px;
    }
</style>
